diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6d38ffa9..1f54fb3f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 ## 0.5.6 (unreleased)
 
+- Updated pg_query
 - Fixed Docker image for `linux/arm64`
 
 ## 0.5.5 (2024-06-02)
diff --git a/Dockerfile b/Dockerfile
index ff7f0d28..75ea8fd5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,9 +1,9 @@
-FROM ruby:3.3.2-alpine3.19
+FROM ruby:3.3.6-alpine3.21
 
 MAINTAINER Andrew Kane <andrew@ankane.org>
 
 RUN apk add --update build-base libpq-dev && \
-    gem install google-protobuf -v "< 4" --platform ruby && \
+    gem install google-protobuf --platform ruby && \
     gem install pgdexter && \
     apk del build-base && \
     rm -rf /var/cache/apk/*
diff --git a/pgdexter.gemspec b/pgdexter.gemspec
index 0e14da7a..de4b2db6 100644
--- a/pgdexter.gemspec
+++ b/pgdexter.gemspec
@@ -19,8 +19,7 @@ Gem::Specification.new do |spec|
   spec.required_ruby_version = ">= 2.7"
 
   spec.add_dependency "csv"
-  spec.add_dependency "google-protobuf", "< 4"
   spec.add_dependency "pg", ">= 0.18.2"
-  spec.add_dependency "pg_query", "~> 5.1"
+  spec.add_dependency "pg_query", "~> 6"
   spec.add_dependency "slop", ">= 4.10.1"
 end